1 files changed, 62 insertions, 0 deletions
diff --git a/fs/btrfs/free-space-tree.h b/fs/btrfs/free-space-tree.h
new file mode 100644
index 000000000..709730e36
--- /dev/null
+++ b/fs/btrfs/free-space-tree.h
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2015 Facebook.  All rights reserved.
+ */
+
+#ifndef BTRFS_FREE_SPACE_TREE_H
+#define BTRFS_FREE_SPACE_TREE_H
+
+#include <linux/bits.h>
+
+struct btrfs_caching_control;
+struct btrfs_fs_info;
+struct btrfs_path;
+struct btrfs_block_group;
+struct btrfs_trans_handle;
+
+/*
+ * The default size for new free space bitmap items. The last bitmap in a block
+ * group may be truncated, and none of the free space tree code assumes that
+ * existing bitmaps are this size.
+ */
+#define BTRFS_FREE_SPACE_BITMAP_SIZE 256
+#define BTRFS_FREE_SPACE_BITMAP_BITS (BTRFS_FREE_SPACE_BITMAP_SIZE * BITS_PER_BYTE)
+
+void btrfs_set_free_space_tree_thresholds(struct btrfs_block_group *block_group);
+int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info);
+int btrfs_delete_free_space_tree(struct btrfs_fs_info *fs_info);
+int btrfs_rebuild_free_space_tree(struct btrfs_fs_info *fs_info);
+int btrfs_load_free_space_tree(struct btrfs_caching_control *caching_ctl);
+int btrfs_add_block_group_free_space(struct btrfs_trans_handle *trans,
+				     struct btrfs_block_group *block_group);
+int btrfs_remove_block_group_free_space(struct btrfs_trans_handle *trans,
+					struct btrfs_block_group *block_group);
+int btrfs_add_to_free_space_tree(struct btrfs_trans_handle *trans,
+				 u64 start, u64 size);
+int btrfs_remove_from_free_space_tree(struct btrfs_trans_handle *trans,
+				      u64 start, u64 size);
+int btrfs_delete_orphan_free_space_entries(struct btrfs_fs_info *fs_info);
+struct btrfs_free_space_info *
+btrfs_search_free_space_info(struct btrfs_trans_handle *trans,
+			     struct btrfs_block_group *block_group,
+			     struct btrfs_path *path, int cow);
+struct btrfs_root *btrfs_free_space_root(struct btrfs_block_group *block_group);
+
+#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
+int __btrfs_add_to_free_space_tree(struct btrfs_trans_handle *trans,
+				   struct btrfs_block_group *block_group,
+				   struct btrfs_path *path, u64 start, u64 size);
+int __btrfs_remove_from_free_space_tree(struct btrfs_trans_handle *trans,
+					struct btrfs_block_group *block_group,
+					struct btrfs_path *path, u64 start, u64 size);
+int btrfs_convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans,
+					struct btrfs_block_group *block_group,
+					struct btrfs_path *path);
+int btrfs_convert_free_space_to_extents(struct btrfs_trans_handle *trans,
+					struct btrfs_block_group *block_group,
+					struct btrfs_path *path);
+bool btrfs_free_space_test_bit(struct btrfs_block_group *block_group,
+			       struct btrfs_path *path, u64 offset);
+#endif
+
+#endif